He wouldn't have a chance against JBJ because he would never get a UFC contract...that bridge has been burned!

I don't believe that. Dana has proved over & over that he's willing to swallow his pride if it means big money for the UFC. That being said, I don't think that he'll budge against M-1's co-promotion demand because there's no up-side in it for the UFC. Unless Fedor somehow gets out from under M-1, they will prevent him from coming to the UFC.